Manufactured by customers needed Material is brass 1/4 NPT machining hole high quality with professional technical ... rolled steel,stainless steel,galvanized steel,copper ,brass.6. Equipment: 25-400ton punching machine, CNC machining, milling, turning, lathe cutting, planning ... line, cold punching line. More than 1600 advanced machines for punching, turing, milling, maching, weld, galvanizing, heat ...